Classification of printing presses: First, according to the type of printing plates, according to the type of printing plates used, it can be divided into three types of printing machines: letterpress, lithographic and gravure. Letterpress printing machine: The printing plate used by the letterpress printing machine has a convex portion of the graphic portion, and a blank portion (not a graphic portion) is recessed, such as a movable type, a lead type, a copper-zinc plate, and a resin plate. Any printing press that uses a letterpress can be collectively referred to as a letterpress printer. Again, lithographic presses, lithographic presses use a plate that has almost the same graphic and blank portions, such as lithograph, flat intaglio, multi-layer metal and pre-coated sensitized plates (ie, PS plates that are now heavily used) Wait. Printers that use such plates can be referred to as lithographic presses. Finally, in gravure presses, the printing plate used in gravure printing is exactly opposite to the relief, and its graphic portion is recessed, lower than the blank portion, such as etched etched gravure or engraved gravure. All printing presses using gravure can be collectively referred to as gravure printing machines.

            Trouble shooting of the printing machine: The printing machine often has various problems during the use process, which often damages the mechanical parts and electrical faults frequently. Some people say that the machine is too old. The old machine is certainly an objective reason, but the new machine will not fail? Some printers have more new machine failures than older machines. Objectively speaking, the use of the machine and the failure rate include the following factors: the manufacturing quality of the machine, installation and commissioning, maintenance, reasonable operation, and most importantly, the quality of maintenance. The quality of the machine is objectively present at the factory. Whether it is a new machine or an old machine, the installation and commissioning is the first level.
            Generally, the new machines are installed and debugged at the factory, after quality inspection, and then transported through separate packaging. Not just horizontal and reasonable installation issues, there is also a check and correction issue. Older machines should be more like this. It is important to know that maintenance and use. In terms of maintenance quality, it is necessary to know that maintenance is not a simple disassembly and assembly. It is necessary not only to find the cause of the failure, but also to find other problems attached. We know that presses have a strict time fit and assembly tolerances and adjustment values. If blindly disassembled and over-adjusted, the machine will wear out or fail again. The procurement and processing quality of spare parts does not necessarily require the use of original parts for any parts and electrical components. The original parts cost a high procurement cycle, unless special or critical parts, most parts and electrical components can be substituted. As long as you understand the part processing technology and component characteristics. In addition to the natural damage of the machine, the circuit failure is mainly due to the hidden faults that are not carefully derived from the installation or the machine and human factors that cause the circuit failure.